1 [data quality] The closeness of a repeated set of observations of the same quantity to one another. Precision is a measure of the control over random error. For example, assessment of the quality of a surveyor’s work is based in part on the precision of their measured values.
2 [data quality] The number of significant digits used to store numbers, particularly coordinate values. Precision is important for accurate feature representation, analysis, and mapping.
3 [data quality] A statistical measure of repeatability, usually expressed as the variance of repeated measures about the mean.